KR102044678B1 - Regenerative heat pump system using underground water - Google Patents

Abstract

The present invention relates to a heat pump system using groundwater. One aspect of a heat pump system including an underground heat exchanger according to an embodiment of the present invention includes a heat pump system using groundwater collected in a sump well: a heat storage tank in which a heat exchange fluid is stored; A heat pump configured to receive heat exchange fluid stored in the heat storage tank and exchange heat with an air conditioning load; A heat exchange unit for performing heat exchange between the heat exchange fluid circulating between the heat storage tank and the heat pump and the ground water supplied from the sump; It includes.

Description

Heat pump system using groundwater {REGENERATIVE HEAT PUMP SYSTEM USING UNDERGROUND WATER}

The present invention relates to a heat pump system using groundwater.

The underground heat exchanger is a heat exchange between the ground and a heat exchange fluid such as groundwater buried in the ground and flowing therein. Prior Patent Document 1 (Republic of Korea Patent No. 1715752), Prior Patent Document 2 (Republic of Korea Patent No. 1092512), and Prior Patent Document 3 (Republic of Korea Patent No. 11568847) disclose a heat pump system according to the prior art. have. First, in the prior patent document 1, the groundwater supplied from the collecting well 100 is heat-exchanged by the heat pump 300, and in the prior patent document 2, the groundwater of the collecting well is introduced into the heat exchange part 110. And in the prior patent document 3, the heat exchange fluid heat-exchanged by the underground heat exchanger 300 is supplied to the geothermal heat pump 100 or the heat storage part 200.

The heat pump system according to the prior art has the following problems.

First, in the prior patent documents 1 and 2, substantially, the groundwater is supplied directly to the heat pump 300 or the like from the collecting well 100, etc. to circulate the entire system. However, in general, the heat pump 300 and the like are installed in the room adjacent to the load, and the collecting well 100 and the like are installed in the outdoor. Therefore, in the case of the prior patent documents 1 and 2, in order to supply groundwater to the heat pump 300 or the like, a relatively high output pump is required, and energy required for this is increased.

On the other hand, in the prior patent document 3, because it is located in the heat storage unit 200 between the geothermal heat pump 100 and the underground heat exchanger 300, using the pump of a relatively low output, the heat storage unit 200 and the underground heat exchanger ( It is possible to circulate the heat exchange fluid between 300). However, in the prior patent document 3, in order to circulate the heat exchange fluid between the geothermal heat pump 100 and the underground heat exchanger 300, a pump of high output will be required. In addition, in the prior patent document 3, when the heat exchange fluid circulates between the heat storage unit 200 and the underground heat exchanger 300, the heat exchange fluid heat-exchanged with the ground in the underground heat exchanger 300 is transferred to the heat storage unit 200. By mixing with the stored heat exchange fluid, the temperature of the heat exchange fluid delivered to the geothermal heat pump 100 can be substantially unnecessarily lowered or increased.

Republic of Korea Patent No.1715752 (Name: Geothermal heating and cooling system using groundwater) Republic of Korea Patent No. 1092512 (Name: Air conditioning system using groundwater) Republic of Korea Patent No.1568847 (Name: Heat pump system including underground heat exchanger)

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide a heat pump system including an underground heat exchanger configured to utilize the geothermal heat more economically.

Another object of the present invention is to provide a heat pump system including an underground heat exchanger configured to be more efficiently operable.

One aspect of a heat pump system including an underground heat exchanger according to an embodiment of the present invention for achieving the above object is a heat pump system using groundwater collected in a sump well: a heat storage tank in which heat exchange fluid is stored; A heat pump configured to receive heat exchange fluid stored in the heat storage tank and exchange heat with an air conditioning load; A heat exchange unit for performing heat exchange between the heat exchange fluid circulating between the heat storage tank and the heat pump and the ground water supplied from the sump; It includes.

In an aspect of an embodiment of the present invention, the heat exchange fluid stored in the heat storage tank is passed through the fluid supply pipe to the heat pump, the heat exchange fluid heat exchanged with the air conditioning load in the heat pump, flows through the fluid recovery pipe When the fluid pump which is delivered to the heat storage tank and installed in either one of the fluid supply pipe and the fluid recovery pipe is operated, heat exchange fluid flowing through the fluid supply pipe and the fluid recovery pipe circulates between the heat storage tank and the heat pump.

In one aspect of the embodiment of the present invention, the groundwater collected in the sump, the ground water pipe flows through the heat exchanger and is recovered to the collection basin, when the groundwater pump installed in the groundwater pipe is operated, the house The groundwater collected in the crystal is heat-exchanged with the heat-exchange fluid in the heat exchange part while flowing through the ground water pipe, and then recovered into the sump.

An aspect of an embodiment of the present invention further comprises a first temperature sensor for flowing the fluid supply pipe to sense the temperature of the heat exchange fluid supplied from the heat storage tank to the heat pump, wherein the groundwater pump, the air conditioning load is When the cooling load, the temperature of the heat exchange fluid sensed by the first temperature sensor is operated when the temperature of the heat exchange fluid detected by the first temperature sensor is increased. It operates when it is below the preset 2nd reference temperature.

One aspect of an embodiment of the present invention, the second temperature sensor for sensing the internal temperature of the heat exchange unit; And a third temperature sensor detecting a temperature of groundwater collected in the sump. The groundwater pump further stops when the difference between the internal temperature of the heat exchanger detected by the second temperature sensor and the groundwater temperature detected by the third temperature sensor is equal to or less than a predetermined reference temperature difference.

In an aspect of an embodiment of the present invention, the heat exchange between the heat exchange fluid flowing through the fluid supply pipe and the ground water flowing through the groundwater pipe through the heat exchange medium filled in the heat exchange unit.

According to the heat pump system using the groundwater according to the embodiment of the present invention, the following effects can be expected.

First of all, In the embodiment Heat exchange fluid circulating between the heat storage tank and the heat pump by the fluid pump, In the heat exchanger After heat exchange, it is delivered to a heat pump. therefore  Of the present invention Example  According to this, heat exchange fluid whose temperature is reduced or increased due to heat exchange with the ground water is directly supplied to the heat pump, whereby the energy transferred from the ground water can be used more efficiently.

Further, in the embodiment of the present invention, the heat exchange fluid and the groundwater are circulated by the fluid pump and the groundwater pump substantially around the heat exchanger. Thus, in embodiments of the present invention, a relatively low power pump can be used to circulate the heat exchange fluid and groundwater. In particular, in the present embodiment, by controlling the operation of the groundwater pump substantially in accordance with the heat exchange efficiency of the heat exchange fluid and the groundwater, it becomes possible to operate the system more economically.

1 is a block diagram showing a heat pump system using groundwater according to a first embodiment of the present invention.
2 and 3 is a flow chart showing the flow of fluid in the heat pump system using the groundwater according to the first embodiment of the present invention.
Figure 4 is a block diagram showing a heat pump system using groundwater according to a second embodiment of the present invention.

Hereinafter, the configuration of a heat pump system using groundwater according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram showing a heat pump system using groundwater according to a first embodiment of the present invention.

Referring to FIG. 1, the heat pump system 1 using groundwater according to the present embodiment uses groundwater collected in the sump 10, and includes a heat storage tank 100, a heat pump 200, and a heat exchanger ( 300).

More specifically, more specifically, the heat storage fluid is stored in the heat storage tank 100. Here, as the heat exchange fluid, water or a refrigerant may be used. For example, the heat storage tank 100 may be installed inside a building such as a machine room.

In the heat pump 200, heat exchange between the air conditioning load 20 and the heat exchange fluid supplied from the heat storage tank 100 is performed. The air conditioning load 20 may be substantially any of a load for air conditioning of a building, that is, a cooling load or a heating load. Therefore, when the air conditioning load 20 is a cooling load, waste heat of the air conditioning load 20 is recovered by heat exchange between the air conditioning load 20 and the heat exchange fluid in the heat pump 200, and the air conditioning is performed. When the load 20 is a heating load, heat will be provided to the air conditioning load 20 by heat exchange of the heat exchange fluid with the air conditioning load 20 in the heat pump 200.

In this embodiment, the heat exchange fluid stored in the heat storage tank 100 flows through the fluid supply pipe 410 to the heat pump 200, and heat exchanges with the air conditioning load 20 in the heat pump 200. The exchanged heat exchange fluid flows through the fluid recovery pipe 420 and is delivered to the heat storage tank 100. When the fluid pump P1 installed in the fluid supply pipe 410 operates, the heat exchange fluid flowing through the fluid supply pipe 410 and the fluid recovery pipe 420 is transferred to the heat storage tank 100 and the heat pump 200. Circulate between

On the other hand, the heat exchange part 300, the heat exchange between the heat exchange fluid circulating between the heat storage tank 100 and the heat pump 200 and the ground water supplied from the sump (10). In the present embodiment, the groundwater collected in the sump 10 is flowed through the groundwater pipe 500 to be recovered to the sump 10 after passing through the heat exchange part 300. When the groundwater pump P2 installed in the groundwater pipe 500 operates, the groundwater collected in the sump 10 flows through the groundwater pipe 500 while exchanging heat with the heat exchange fluid in the heat exchanger 300. And then it is recovered to the sump (10). In addition, in the heat exchange unit 300, the heat exchange fluid flowing through the fluid supply pipe 410 and the groundwater pipe 500 flow through the heat exchange medium 310 filled in the heat exchange unit 300. Heat exchange between the flowing ground water takes place. As the heat exchange medium 310, water or a refrigerant may be used.

The present embodiment may further include a first temperature sensor S1. The first temperature sensor S1 detects the temperature T of the heat exchange fluid supplied from the heat storage tank 100 to the heat pump 200 by flowing the fluid supply pipe 410. When the air conditioning load 20 is a cooling load, the groundwater pump P2 operates when the fluid temperature T sensed by the first temperature sensor S1 is equal to or greater than a preset first reference temperature TS1. can do. In addition, when the air conditioning load 20 is a heating load, the groundwater pump P2 may have a case in which the fluid temperature T detected by the first temperature sensor S1 is equal to or less than a preset second reference temperature TS2. It can work.

Hereinafter, the operation of the heat pump system using the groundwater according to the first embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

2 and 3 are flow charts showing the flow of fluid in the heat pump system using the ground water according to the first embodiment of the present invention.

First, referring to FIG. 2, when the fluid pump P1 operates, the heat exchange fluid stored in the heat storage tank 100 is supplied to the heat pump 200 through the fluid supply pipe 410. The heat exchange fluid supplied to the heat pump 200 may recover waste heat from the air conditioning load 20 or provide heat to the air conditioning load 20 by heat exchange with the air conditioning load 20. And the heat exchange fluid heat-exchanged with the air conditioning load 20 in the heat pump 200 is recovered to the heat storage tank 100 through the fluid recovery pipe 420 by the continuous operation of the fluid pump (P1), Substantially the heat exchange fluid will circulate between the heat storage tank 100 and the heat pump 200.

On the other hand, when the temperature of the heat exchange fluid is increased or decreased by heat exchange with the air conditioning load 20 in the heat pump 200, by the heat exchange fluid circulating between the heat storage tank 100 and the heat pump 200. Recovery of waste heat from the air conditioning load 20 or provision of heat to the air conditioning load 20 becomes impossible. Therefore, in this case, heat exchange is performed between the heat exchange fluid circulating between the heat storage tank 100 and the heat pump 200 and the groundwater collected in the sump well 10.

More specifically, referring to FIG. 3, when the air conditioning load 20 is a cooling load, the fluid temperature T detected by the first temperature sensor S1 is equal to or greater than the first reference temperature TS1, When the air conditioning load 20 is a heating load, the groundwater pump P2 operates when the fluid temperature T detected by the first temperature sensor S1 is less than or equal to the second reference temperature TS2. Therefore, the groundwater collected in the sump 10 is recovered to the sump 10 again through the heat exchange part 300 while flowing through the groundwater pipe 500.

On the other hand, the heat exchange fluid and ground water flowing through the fluid recovery pipe 420 and the ground water pipe 500 by the operation of the fluid pump (P1) and ground water pump (P2) is heat exchanged in the heat exchange unit (300). Substantially, heat exchange between the heat exchange fluid flowing through the fluid recovery pipe 420 and the ground water flowing through the ground water pipe 500 may be performed through the heat exchange medium 310 filled in the heat exchange part 300. Is done.

Therefore, when the air conditioning load 20 is a cooling load, the waste heat from the air conditioning load 20 can be efficiently recovered by the heat exchange fluid whose temperature is relatively reduced by heat exchange with the groundwater. In addition, when the air conditioning load 20 is a heating load, heat may be efficiently provided to the air conditioning load 20 by heat exchange fluid having a relatively increased temperature by heat exchange with groundwater.

Particularly, in the present embodiment, the heat exchange fluid flowing by the fluid pump P1 is transferred to the heat storage tank 100 after being heat exchanged with the groundwater in the heat exchange unit 300 and mixed with the heat exchange fluid stored therein. Since the heat pump 200 is transferred to the heat pump 200, a phenomenon in which the temperature is unnecessarily increased or decreased is prevented. In other words, in the present embodiment, since the heat exchange fluid heat-exchanged with the groundwater in the heat exchange part 300 is directly transferred to the heat pump 200, the substantial heat exchange efficiency may be increased.

Hereinafter, a heat pump system using groundwater according to a second embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

4 is a block diagram showing a heat pump system using groundwater according to a second embodiment of the present invention. For the same components as those of the first embodiment of the present invention described above among the components of the present embodiment, reference numerals of FIGS. 1 to 3 are used, and detailed description thereof will be omitted.

Referring to Figure 4, seen Example  The heat pump system 2 using the groundwater by further adding the second and third temperature sensors S2 and S3. Include. The second temperature sensor S2 detects the internal temperature t1 of the heat exchanger 300, and the third temperature sensor S3 measures the temperature t2 of groundwater collected in the sump 10. Detect.

And  example In the embodiment And groundwater pump P2 according to the difference between the internal temperature t1 of the heat exchange part 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3. The operation of is made selectively. More specifically, in the present embodiment, the internal temperature t1 of the heat exchange unit 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3. If the difference is less than or equal to the preset reference temperature difference Δts, the groundwater pump P2 is stopped.

As such, the groundwater pump according to the difference between the internal temperature t1 of the heat exchange part 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3. The selective operation of P2 is for efficiently operating the groundwater pump P2, which requires a large amount of energy when operating relatively. In more detail, when the groundwater pump P2 operates, relatively low or high temperature groundwater is supplied from the sump 10 to the heat exchange part 300, thereby substantially inside the heat exchange part 300. The temperature t1 is lowered or increased. However, when the difference between the heat exchange part 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3 is equal to or less than the reference temperature difference Δts, Recovery of heat or provision of heat from the groundwater to the heat exchanger 300 may not be made efficiently or substantially. In this case, therefore, the groundwater pump P2 is stopped, whereby unnecessary consumption of energy can be prevented. For example, the difference between the internal temperature t1 of the heat exchange part 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3 is 5 ° C. or less. Preferably, at 0 ° C., the groundwater pump P2 may stop.

Within the scope of the basic technical idea of the present invention, many modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

10: sump 20: air conditioning load
100: heat storage tank 200: heat pump
300: heat exchanger 410: fluid supply pipe
420: fluid recovery pipe 500: groundwater pipe
P1, P2: Pumps S1, S2, S3: Temperature Sensor

Claims (6)

In a heat pump system using groundwater collected in the sump (10):
A heat storage tank 100 in which the heat exchange fluid is stored;
A heat pump 200 receiving heat exchange fluid stored in the heat storage tank 100 to exchange heat with the air conditioning load 20;
A heat exchange part 300 for performing heat exchange between the heat exchange fluid circulating between the heat storage tank 100 and the heat pump 200 and the ground water supplied from the sump well 10;
A second temperature sensor S2 for detecting an internal temperature t1 of the heat exchanger 300; And
A third temperature sensor S3 for detecting a temperature t2 of the groundwater collected in the sump 10; Including,
The groundwater collected in the sump (10) is flowed through the groundwater pipe (500) and passed through the heat exchange part (300) and then recovered to the sump (10),
When the groundwater pump P2 installed in the groundwater pipe 500 operates, the groundwater collected in the sump 10 flows through the groundwater pipe 500 and is heat-exchanged with the heat exchange fluid in the heat exchanger 300. After it is recovered to the sump (10),
The groundwater pump (P2),
The difference between the internal temperature t1 of the heat exchange part 300 detected by the second temperature sensor S2 and the groundwater temperature t2 detected by the third temperature sensor S3 is equal to or less than a preset reference temperature difference Δts. Heat pump system using groundwater which stops on the back side.
The method of claim 1,
The heat exchange fluid stored in the heat storage tank 100 flows through the fluid supply pipe 410 and is delivered to the heat pump 200.
The heat exchange fluid heat-exchanged with the air conditioning load 20 in the heat pump 200 is transferred to the heat storage tank 100 by flowing the fluid recovery pipe 420,
When the fluid pump P1 installed in either one of the fluid supply pipe 410 and the fluid recovery pipe 420 operates, the heat exchange fluid flowing through the fluid supply pipe 410 and the fluid recovery pipe 420 is stored in the heat storage tank. A heat pump system using groundwater circulating between 100 and heat pump 200.
delete delete delete The method of claim 2,
In the heat exchange unit 300, the heat exchange fluid flowing through the fluid supply pipe 410 and the groundwater pipe 500 flow through the heat exchange medium 310 filled in the heat exchange unit 300. Heat pump system using groundwater where heat exchange between groundwater occurs.

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